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Overview
L-Cystine (Cystine Acid) is not considered one of the 20 amino acids, L-Cystine (Cystine Acid) is a sulfur-containing derivative obtained from oxidation of cysteine amino acid thiol side chains. It functions as an antioxidant and protects tissues against radiation and pollution, slowing the aging process. It also aids protein synthesis. L-Cystine (Cystine Acid) is abundant in many proteins of skeletal tissues and skin, and found in insulin and digestive enzymes chromotrypsinogen A, papain, and trypsinogen.
Chemical Properties
| Molecular Formula | C6H12N2O4S2 |
| Molecular Weight | 240.3 |
| CAS Numbers | 56-89-3 |
| Solubility | DMSO |
| Purity | 98% by HPLC |
| IUPAC/Chemical Name | |
| InChl Key | |
| InChl Code | |
| SMILES Code | [C@H](CSSC[C@@H](C(O)=O)N)(C(O)=O)N |
Storage and Handling
0C Short Term, -20C Long Term
Synonyms
References
Ohtsu I, et al. Uptake of L-cystine via an ABC transporter contributes defense of oxidative stress in the L-cystine export-dependent manner in Escherichia coli. PLoS One. 2015 Apr 2;10[3] e0120619.